Bought a used Arc 125.2 amp from a person that removed it from a bike for an upgrade. They also sent the wiring harness for inputs and outputs to and from the amp. I found a resistor, 32 ohm, soldered across the positive and negative speaker input leads from the HU to the amp. Any idea why these would be there?

 

never seen or heard of it... Can't imagine why anyone would put a resistor across the input lead especially unless it was some one's half-a$$ed attempt at signal reduction, noise reduction, ignition pop, etc.

Don't use that harness.

 

The harmon kardon head units from the factory have been known to throw error codes when taking the speaker outputs to an aftermarket amp. The headunit sees no load and goes into error mode. I'm guessing that somehow a 32 ohm load might have been somebodies answer to that? Just guessing.

 

good point but that resistor across the + and - leads on the output of the head unit affects the input to the amp. Don't understand where the guy you bought that from would have gotten that idea. Certainly not from ARC Audio or an experienced audio store.

 

Well for the record, I installed a new KS125.2 amp with a new wire harness. No resistors in this wiring. Works great.